Welcome to Dirty Ducts Cleaning & Environmental Services, your trusted partner for advanced ductwork interior liner insulation coating. Our specialized coating process seals and encapsulates deteriorating duct liner, restoring insulation performance and preventing fiber release into the airstream. Serving Madison, Milwaukee and surrounding areas, we are the premier choice for restoring and protecting your ductwork liner.
COMPREHENSIVE DUCTWORK LINER INSULATION COATING SOLUTIONS
We offer a comprehensive ductwork interior liner insulation coating service to meet the unique needs of our diverse clientele. Whether you own a home, manage a commercial property, oversee an industrial facility, or operate a school or hospital, our expert team is equipped to seal, encapsulate, and restore your duct liner insulation.
DUCT LINER COATING & ENERGY EFFICIENCY
Damaged or deteriorating duct liner insulation forces your HVAC system to work harder, wasting energy and driving up utility bills. Our interior liner insulation coating seals eroding fiberglass liner in place, restoring a smooth, insulated surface inside the duct. This protects your system’s efficiency, reduces strain on your HVAC equipment, and helps extend the life of your ductwork, keeping air flowing smoothly even in extreme weather conditions.


AIR QUALITY & HEALTH
Deteriorating duct liner can shed fibers and particles directly into the air you breathe, and damaged insulation creates the damp conditions mold needs to grow. Our interior liner insulation coating encapsulates worn fiberglass liner, locking in loose fibers and sealing out moisture. This helps prevent mold growth and airborne contaminants, which is especially important for occupants with asthma or allergies. By coating and restoring your duct liner, you invest in cleaner air and a healthier environment for your home or workplace.
OUR PROCESS
Our technicians take pride in restoring interior duct insulation through a careful, multi-step encapsulation process. Before applying any coating, we thoroughly clean the ductwork to ensure the surface is properly prepared for maximum adhesion and long-term performance.
From there, multiple coats of specialized encapsulant are methodically layered, allowing each application to build a durable, uniform finish that helps restore the integrity of the insulation. Rather than rushing the process, we take the time to ensure every section is evenly coated, delivering a clean, professional restoration built to last.
CONTACT DIRTY DUCTS TODAY
Dirty Ducts Cleaning & Environmental Services is dedicated to providing superior ductwork interior liner insulation coating solutions. Whether you need services for your home, business, or institution, our expert team is ready to deliver exceptional results. Contact us today to ensure your ductwork is clean, efficient, and safe.
OUR FOCUS
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FREQUENTLY ASKED QUESTIONS
Ductwork interior liner insulation coating seals and encapsulates deteriorating fiberglass liner, preventing fibers and particles from entering the airstream. It restores insulation performance, improves energy efficiency, and helps prevent mold growth on damaged liner. Coating your duct liner can also extend the life of your ductwork and eliminate the need for costly liner or duct replacement.
We recommend having your ductwork inspected every 3-5 years to check for deteriorating or damaged duct liner. If your liner shows signs of erosion, delamination, or fiber shedding, an interior liner insulation coating can restore it and prevent the need for costly duct replacement.
Signs your duct liner may need coating or repair include visible fiberglass fibers or debris near vents, a musty odor, allergy or respiratory symptoms, sagging or crumbling liner material, and visible erosion or water damage inside the ductwork.
Our process begins with a thorough inspection and cleaning of the ductwork using our vac trucks to remove loose contaminants and debris. Once the surface is clean and dry, we apply a specialized encapsulant coating directly to the damaged fiberglass duct liner, sealing eroding fibers in place and restoring a smooth, protective surface. The coating cures to form a durable barrier that locks in insulation performance and prevents further deterioration.
Yes. Coating and sealing damaged duct liner restores its insulating properties, which helps your HVAC system maintain temperature more efficiently. This reduces the energy needed to heat or cool your space and can lower your utility bills.
For commercial ductwork, the coating process timeline varies depending on the size of the HVAC system and the extent of liner damage. We will develop and discuss the duration with your team to minimize impact to your daily operations. Work can also be scheduled for off shifts, weekends, and holidays.
For residential ductwork, the timeline depends on your home’s size and the condition of the duct liner. Once we know your home’s square footage, we can give you an approximate range of time. A typical home takes 3-4 hours to complete, including inspection, cleaning, and coating application. Service is scheduled on non-holiday weekdays and generally begins at 8 am or 12:30 pm.
Yes. When performed by trained professionals, duct liner insulation coating is safe for your HVAC system. In fact, it can extend the life of your ductwork by sealing damaged liner in place, reducing strain on your system, and preventing further deterioration that could otherwise require costly duct replacement.
The cost varies based on the size of your ductwork system and the extent of liner damage.
For commercial settings, we will review your building’s HVAC prints if available and/or perform a site walkthrough to assess the condition of the duct liner and determine costs. HVAC prints can be emailed to our team if you have them in electronic format. A written proposal with pricing is then prepared.
For residential settings, we just need your home’s finished square footage and address to give you pricing. A site visit is not needed.











